Hi there
I have quarterly data on firms in each state in a country. The data consists of individual files for each state and each quarter from 1980 to 2005. There are 6 variables of interest in each file - STATENAME, FIRMID, YR_QTR, EMPL1, EMPL2, EMPL3 and several 100 variables that I am not interested in. I want to sum the employment in each quarter (EMPL1 EMPL2 EMPL3) and find the first date of non-zero employment for each firm. I am using PROC APPEND for now to create a combined dataset for each state and then identifying the first non-zero employment for each firm.
Is there a more efficient way to program this without creating a large dataset? Any help with the code would be much appreciated.c
Thanks
Dana
Yes! Summarise each table, and *then* append the summaries where employment is non-zero.
Something like
%macro loop;
%do year=1980 %to 2005;
%do qtr=1 %to 4;
proc summary data=DATA_&year.Q&qtr. nway;
id YR_QTR;
class STATENAME FIRMID;
var EMPL1 EMPL2 EMPL3 ;
output out=SUM_&year.Q&qtr. sum=;
run;
%end;
%end;
data WANT;
set
%do year=1980 %to 2005;
%do qtr=1 %to 4;
&SUM_&year.Q&qtr.
%end;
%end;
;
where EMPL1 & EMPL2 & EMPL3;
by YR_QTR STATENAME FIRMID;
... more logic
run;
%mend;
%loop;
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